\underrightarrow{AB}
The command \underrightarrow{AB} is used in LaTeX to place a right-pointing arrow underneath a pair of characters, typically used to denote a vector or a directed line segment from point A to point B. This is particularly useful in mathematical expressions where the direction of the vector is significant.
Vector addition of two directed line segments.
\underrightarrow{AB} + \underrightarrow{BC} = \underrightarrow{AC}
Describing a vector quantity in physics.
\text{The vector } \underrightarrow{AB} \text{ represents the force applied.}
Dot product of two perpendicular vectors.
\underrightarrow{PQ} \cdot \underrightarrow{QR} = 0